| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 249 |
1%
|
| 2 | Monthly | 1598 |
6.5%
|
| 3 | Yearly | 3267 |
13.2%
|
| 4 | Less often | 4889 |
19.7%
|
| 5 | Not at all | 14764 |
59.6%
|
| Sysmiss | 817 |